Correct me if I'm wrong, I know the UE diffs are 3.31 (43/13) but the HB are geared higher than that, something like 4.11 ??

Reason to point this out, I've seen some last minute wailing when HBs were received expecting same gear ratio only to realize they're geared higher which requires re-gearing elsewhere to maintain same fdr. Nothing like last minutes surprises!